Charles f



NW. IO

. struction hereinafter particularly'described and pointed outin'theclaims.

' of the rack bar and hold the clamp in ad 'St. Paul, Ramsey county, Minnesota, have invented a certain new and Improved Combined in the block 5, the hole in the gear, for this pivot being a slot 11, as shown in Fig. 1, which and holding'the clamp in adjusted positions.

UNITED STATES oi-manns F. WEYHE, OF s r. PAUL, MINNESOTA."

PATENT: OFFICE;

COMBINED, CLAMP Anovi ss.

SPECIFICATION forming partlof Letters Patent No. 529,765, dated ovembr 27,1394.

Application filed time 13, 1892.'

To all whom it may concern: Be it known that I, CHARLES F. Waves, 0

Clamp, and Vise, of which the following is a specification.

My invention relates to improvements in clamps of theclass designed for use inthe putting together of frames and similar structures, and consistsin'improved features of con- In the accompanying drawings forming part of this specification, Figure 1 is a sectional side elevation-of my improved clamp. Fig. 2, is a plan view of the same, and Fig. 3 is asectional side elevation of a modified construction.

In the drawings 2 represents a rack bar provided with the'gear teeth 3, and having at its outer end the clamp jaw 4. Sliding along jacent tothe jaw 4 forms the other jaw 6 of gravity dog 7 adapted to engage the teeth 3' justed positions. In the'construction shown in Figs. 1 and 2 the clamp is operated by means of the segmental gear 8 provided withthe handle 9 andturned on a pivot 10 fixed permits the gear to be lifted from he rack and turned on its pivot. without moving the bar. With the handle 9 in the position shown in Fig. 1 and the gear in engagement with the rack, by lifting the handle the gear turns on its pivot and draws-the rack bar through the block 5 closing the jaws together, the dog 7 engaging the teeth of the rack successively,

The gear can then be released from the rack by simply-slipping it upward, the pivot workingin the slot 11, so as to release the teethof the rack. The'arm can then be depressed to the original position and the operation repeated. When in the lowered position shown in Fig. 1, the point 12 on the end of the handie 9 engages the teeth of the rack, thus ho1ding the clamp firmly in position.

In the modified constructionshown in Fig.

Serial-No. 436,495. mama.)

3, the block 5 is provided withthe pinion 13, the teeth of which mesh with the rack. The

pinion is operated by means of the segmentalgear 1=t having a slot 15 extending preferably length'wiseof the'handle 17, in which stands the pivot l6 fixed in the block, the handle having a point 18 similar to that of the handle 9. In theope'rationof this form ofclamp I the handle 1 is worked in the'opposite direction from'that of the handle 9, being lifted and brought into engagementwith the teeth of the pinion 13. On bearing upon the handle it acts as a lever with the segmental gear .as the fulcrum end engaging the teeth of the pinion 13, and turning it on its pivot thereby drawing the rack bar as before, described.

ln'case it is-desired to use the clamp fixedv to the bench, it may be secured thereon by 2through the block 5 means of a screw passed through the hole 19 into the bench, the clamp vise.

r I claim- -1. In a clamp, the combination with the relatively fixed ja-w and its connected rack bar,

of the movable jaw slidable along said rack bar, the lever operated means havinga slidthus serving as a T ing pivotal connection with said block for-e ngaging the teeth of the rack bar to move said block thereon, and'theprojection upon said leveradapted to'engage said rack to 'lockthe' I clamp in adjusted positions.

2. In a clamp, the combination with the elatively'fixed jaw audits connected rack ar, of the movable I jaw .slidable along said rack bar, the lever operated means having a slid ing'pivotal connection with said block for engaging the teeth of the rack bar to move said block thereon, the dog carried by said block and adaptedto engage said rack bar and the projeptio'n'upon said lever, adapted to engage said rash tolock the clamp in' adjusted posi-.

tionsl,-

3. In aclamp, the combination with the rack bar, and the rigidly connected jaw, of the locking device carried by said lever for en- I jeciinn upon. said ieveradapted to engage said gaging said rack tolhoid said clamp in adrack when the leveris depressed so as to lock justed positions. the clamp in adjusted positions.

4. In ac'lamp,the combination with theraek In. testimony wheieof I have hereunto set 5 bar and its fixed jaw, of the movabie jaw s1idmy hand this 25th day of May, 1892.

a l arran ed on said bar the lever ivoted 1 1 i r 1 in-s aid mo gable jaw with a. siidable onnec- CHARLhE tion by means of which it may be raised and In presence of lowered thereimthe teeth carried by said ie- T. D. Ieinewm,

xo ver adapted to engage said. rack, and the prov H. S. JOHNSO 

